Just a thought. Working on the basis that any payment that isn’t of direct benefit to the owners corp, albeit made in misguided good faith, what do you do? Ask the committee to ask for the money back or just ask those who voted in favour of the contribution to refund the money? Or just tell them to let it go and don’t do it again?
I would think that similar to any other illegal or improper payment, it should be reversed. Though I’m not sure how the recipient would handle refunding a donation.
Perhaps it would be easier to have those units who voted for the donation to re-imburse the OC, which would solve both problems (avoid the OC making a donation, and those people who wanted to donate money would be suitably out of pocket).
If the amount was small enough (and this amount would vary for each person involved), then it could be “ignored” and some commitment that it would not recur.